Barium Sulfate Jamming Pump - Thickening, Filtering, CCD ...
I would guess that you have formed barium sulfate (essentially barite) which is pretty insoluble, and not too easy to remove. This is probably a result of mixing of two different waters; one rich in barium (rich is a relative term, but over time it can add up), probably representative of reducing conditions with a low sulfate concentration and a second more oxidized sulfate bearing water.
Barite Grinding Mill – bestinagency
Historically baryte was used for the production of barium hydroxide for sugar refining, and as a white pigment for textiles, paper, and paint. Barite is processed by Barite grinding mill. The following is the introduction about CLIRIK HGM series barite grinding mill. The Application of Barite grinding mill: